I made it at TechShop.
Only use tools that you have had the appropriate training for. Always wear eye protection when near tools. Understand and accept the inherent risks associated with any operation.
Vertical Belt Sander
Table Router with a 1/8th inch radius bit
Color Printed Paper - 75 cents each
1/8th" 2'x4' MDF - $4
Colored Felt Sheet - 32 cents each
Spray Clear Sealer
Spray Contact Cement
Step 1: Prepare and Print a Design
Some notes on the layout: Don't put lines where you will cut, they will be visible. Remember to bleed any graphics that are supposed to go right up to the edge about an eighth of an inch. About a quarter of an inch of margin reduces the need for exact cutting. Add cut marks on all sides, then chop away. The marks will fall off before you get to use them on one of the sides, that's ok. Pick the scrap off the table- it is a perfect measuring tape for where to cut the rest are. Just line it up and cut it up.